PI Heads?????
Technical Article Contributor
Joined: Oct 2006
Posts: 1,770
Likes: 6
From: Michigan
was just wondering you really only got 30 more ponies out of the pi heads on a non pi block ? i have been reading about the swap and i have been hearing around 75 to 100 horse? and was also told that the stock intake man would also produce more torque than the pi one which would produce more power. well that all depends on your application i guess but was just wondering
if its really only 30 horse, man thats a lot of work . might as well put the 5.4 in it?
if its really only 30 horse, man thats a lot of work . might as well put the 5.4 in it?
Technical Article Contributor
Joined: Dec 2006
Posts: 1,584
Likes: 0
From: Sask. Canada
Well the pre power improved intake will not match up with the PI heads so unless there is some kind of adapter that I'm not aware of you will have to use the PI intake with the PI heads. I think 30 hp is about it for power. Maybe a tune would help but I don't see 75-100 hp coming from the PI swap itself. I know I could have pulled and reinstalled an engine faster than this upper end swap so you may be right about just going with a 5.4.
Senior Member
Joined: Jan 1999
Posts: 7,030
Likes: 3
From: WINDSOR, ONTARIO, CANADA
HI!... Your lucky to get a 30H.P (flywheel) increase. The usual is 20-25H.P. On the non P.I 5.4's, they were only 235H.P. P.I 5.4's were 260H.P. If you think your going to get 75-100H.P (flywheel) with a P.I swap then your going to be in for a BIG surprise. To get those kinda gains your need full stage II/III heads with cams.